Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Hypothesis testing for mean and proportion.

1. A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches. To test this claim against the alternative that the actual proportion of doctors who recommend aspirin is less than 0.90, a random sample of 100 doctors was selected. assume you reject the null hypothesis. What conclusion can you draw?
i)There is not sufficient evidence that proportion of doctors who recommend aspirin is not less than 0.90.
ii)There is sufficient evidence that proportion of doctors who recommend aspirin is not less than 0.90.
iii)There is not sufficient evidence that proportion of doctors who recommend aspirin is less than 0.90.
iv)There is sufficient evidence that proportion of doctors who recommend aspirin is less than 0.90.

2. A major videocassette rental chain is considering opening a new store in an area that currently does not have any such stores. The chain will open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with videocassette recorders (VCRs). It conducts a telephone poll of 300 at random selected households in the area and finds that 96 have VCRs. status the test of interest to the rental chain.

3. A major videocassette rental chain is considering opening a new store in an area that currently does not have any such stores. The chain would open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with videocassette recorders (VCRs). It conducts a telephone poll of 300 randomly particular households in the area and finds that 96 have VCRs. The value of the test statistic in this problem is approximately equal to:
a)2.80
b)2.60
c)1.94
d)1.30

4. A major videocassette rental chain is considering opening a new store in an area that currently does not have any such stores. The chain would open if there is evidence that more than 5,000 of the 20,000 households in the area are equipped with videocassette recorders (VCRs). It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have VCRs. The p-value associated with the test statistic in this problem is approximately equal to:

a) 0.0100
b) 0.0051
c) 0.0026
d) 0.0013

5. An appliance manufacturer claims to have developed a compact microwave oven that consumes an average of no more than 250 W. From previous studies, it is believed that power consumption for microwave ovens is normally distributed with a standard deviation of 15 W. A consumer group has decided to try to discover if the claim appears true. They take a sample of 20 microwave ovens and find that they consume an average of 257.3 W.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922807

Have any Question? 


Related Questions in Statistics and Probability

A scarf company built a new parking garage in a business

A Scarf Company built a new parking garage in a business district. For a random sample of 100 days, daily fees collected averaged $1,800, with a standard deviation of $500. Construct a 90% confidence interval estimate of ...

1 why is it possible to consider anova as a special case of

1. Why is it possible to consider ANOVA as a special case of regression? 2. Give an example of when simultaneous, hierarchical, and stepwise multiple regression analyses might be used in research. 3. How is a log linear ...

Describe the technologies that contributed to the

Describe the technologies that contributed to the development and advancement of the newspaper from small, infrequent circulations of a few brief pages to the mass production of daily, extensive pages of news.

Given the following waiting time distribution in a hotel

Given the following waiting time distribution in a hotel, compute the  expected value  of the waiting time in 2 dec pl.    Waiting time (minutes) Probability 4.0            20% 4.5 28% 5.0 32% 5.5 10% 6.0 10%

Question 67 of laguardia students are female a random

Question: 67% of LaGuardia students are female. A random sample of 6 students is to be selected. Let the random variable X be the number of female students in a sample. a.) Explain why X is a binomial random variable. (F ...

A machine used to fill gallon-sized paint cans is regulated

A machine used to fill gallon-sized paint cans is regulated so that the amount of paint dispensed has a mean of 138 ounces and a standard deviation of 0.40 ounce. You randomly select 45 cans and carefully measure the con ...

Ship collisions are rare in the houston ship channel the

Ship Collisions are rare in the Houston Ship Channel. The mean is .8 collisions in 6 months What is the probability of no collisions in 6 months. What is the probability of one collision in a year?

Consider repair costs for car a and car b the mean repair

Consider repair costs for Car A and Car B. The mean repair cost for each is $500 per year. Which statistics about repair costs may play into your decision to purchase one of these cars? Which car would you choose? Explai ...

1 consider the circumstances under which a

1. Consider the circumstances under which a repeated-measures experimental research design, rather than a between-participants experimental design, might be more or less appropriate. 2. Explain what counterbalancing refe ...

Among the best companies to work for in the us 33

Among the best companies to work for in the US, 33% experienced double digit job growth, 49% experienced single digit growth, and 18% experienced no growth or decline. A closer examination of the 30 companies that make u ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen